Well Test Analysis of Deforming Reservoirs by use of MDH Type Curves

Tom A. Jelmert; Tommy Toverud

doi:https://doi.org/10.14445/22315381/ IJETT-V38P250

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Volume 38 | Number 2 | Year 2016 | Article Id. IJETT-V38P250 | DOI : https://doi.org/10.14445/22315381/IJETT-V38P250

Well Test Analysis of Deforming Reservoirs by use of MDH Type Curves

Tom A. Jelmert, Tommy Toverud

Citation :

Tom A. Jelmert, Tommy Toverud, "Well Test Analysis of Deforming Reservoirs by use of MDH Type Curves," International Journal of Engineering Trends and Technology (IJETT), vol. 38, no. 2, pp. 276-281, 2016. Crossref, https://doi.org/10.14445/22315381/ IJETT-V38P250

Abstract

The objective of this study is to predict changes in formation thickness, permeability, and porosity, as a function of fluid pressure. The methodology depends on well test interpretation by type curve matching. Changes in formation permeability may lead to poor well performance. Compaction may lead to reduced well integrity, notably for vertical and deviated wells. Then, there may be additional relative movement between the well and the formation in comparison with conventional reservoirs. Use of well-known transformations leads to diffusivity equations of linear appearance. Many solutions are available. Corresponding pressure solutions may be obtained by an inverse transformation.We find that, for a deforming reservoir, analysis based on the method of permeability modulus gives the composite (sum) elastic modulus.By interpretation of MDH type curves for build-up tests, we quantify the values of the elasticity moduli for both the thickness and permeability.

Keywords

Deformable Reservoir Stress-sensitivity, Well Testing, Type Curves.

References

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